diff --git a/libtransmission/json-test.c b/libtransmission/json-test.c
index 52dd5245f..7df438cdc 100644
--- a/libtransmission/json-test.c
+++ b/libtransmission/json-test.c
@@ -11,7 +11,7 @@
 
 #include <locale.h> /* setlocale() */
 
-#define __LIBTRANSMISSION_VARIANT_MODULE___
+#define __LIBTRANSMISSION_VARIANT_MODULE__
 #include "transmission.h"
 #include "utils.h" /* tr_free */
 #include "variant.h"